IRS21571DSPBF International Rectifier, IRS21571DSPBF Datasheet - Page 24

• Manufacturer Part Number: IRS21571DSPBF
• Description: IC BALLAST CTRL 600V 16-SOIC
• Manufacturer: International Rectifier
• Type: Ballast Controllerr

Specifications of IRS21571DSPBF

• Frequency: 43.7 ~ 48.3 kHz
• Current - Supply: 10mA
• Current - Output: 180mA
• Voltage - Supply: 11.5 V ~ 15.6 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Package: 16-lead SOIC Narrow
• Circuit: Fluorescent Ballast IC
• Offset Voltage (v): 600
• Output Source Current Min (ma): 180
• Output Sink Current Min (ma): 260
• Pbf: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Recovery from such a fault condition is accomplished by cycling either SD pin or the VCC pin. When a lamp is
removed, the SD pin goes high, the fault latch is reset, and the chip is held off in an unlatched state. Lamp
replacement causes the SD pin to go low again, reinitiating the startup sequence. The fault latch can also be
reset by the undervoltage lockout signal, if VCC falls below the lower undervoltage threshold.
Figure 18: Auto restart for lamp replacement
Figure 17: Operation below resonance
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CS
VS
CPH
SD
VS
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IRS21571D